甘肃省种植业系统的能值动态

为了探讨甘肃省种植业系统可持续发展,本研究基于能值理论研究了2007-2017年甘肃省种植业系统的能值投入和产出动态变化.结果表明:甘肃省种植业系统总能值投入呈先增加后减少趋势,2015年达到峰值,为5.48×1022 sej;种植业系统总能值产出呈先增加后减少趋势,2014年达到峰值,为2.55×1022 sej.与全国种植业系统相比,甘肃省种植业系统的净能值产出率、能值投入率、环境承载率和可持续发展指数的年均值偏低,分别为0.71、1.54、1.50和0.48.由此可见,甘肃省种植业系统缺乏活力,发展潜力较低,属于不可持续的消费型经济系统.因此,甘肃省在今后发展过程中,应该提高资源利用率,减少不可更新工业辅助能的投入,注重生态环境保护,进一步促进种植业系统的可持续发展.

Emergy dynamic analysis of planting industry system in Gansu Province

To discuss the sustainable development of the planting industry in Gansu Province, the dynamic changes in energy input and output of the planting industry in the province from 2007 to 2017 were studied based on emergy theory. The results showed that both the total energy input and output of the planting industry in Gansu Province first increased and then decreased, with the energy input reaching a peak of 5.48 × 1022 sej in 2015 and the output reaching a peak of 2.55 × 1022 sej in 2014. Compared with the national planting industry, the annual mean values of net emergy yield ratio, emergy investment ratio, environmental load ratio, and emergy sustainable index of the planting industry system are lower in the Gansu Province, which are 0.71, 1.54, 1.50, and 0.48, respectively. It can be seen that the planting industry system in Gansu Province lacks vitality, has low development potential, and belongs to the unsustainable consumption economy system. Therefore, in the future development of Gansu province, we should improve the utilization rate of resources, reduce the input of non-renewable industrial auxiliary energy, pay attention to the protection of the ecological environment, and further promote the sustainable development of the planting industry.